Tiananmen Square activist refused entry to Hong Kong to attend June 4 museum opening
South China Morning Post, April 21, 2014
http://www.scmp.com/news/hong-kong/article/1491438/tiananmen-square-activist-refused-entry-hong-kong-attend-june-4
Related:
杨建利被拒入境香港参观六四纪念馆 (Yang Jianli refused entry to HK to participate in June Fourth Museum opening)
British Broadcasting Corporation, April 20, 2014
http://www.bbc.co.uk/zhongwen/simp/china/2014/04/140420_hongkong_tiananmen_dissident.shtml